How to detect epad USB signature pad is connected to system?

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Javascript

AngularJs

Hello Team,

I have ePad signature device and want to check whether this device is connected to the system or not?

So for this, I have tried two methods but not able to succeed.

So I request you that if you have any method with you which detect USB ePad signature device then please share with me so I can make changes in code and able to find USB ePad signature device to the system.

Awaiting for favorable correspondence from your side.

What I have tried:

1)  function isePad() {
             var epad;
             if (window.document.esCapture1) {
             epad = window.document.esCapture1.ConnectedDevice;
             console.log("epad", epad);
            }

            if (!epad) {
               alert('Sorry epad either is not Connected or/and drivers are not installed');
            }
         }
         isePad();

2)
    navigator.usb.requestDevice({filters:[]}).then(function(device){
   console.log(device);
   });

 

   navigator.usb.getDevices().then(function(devices){ console.log(devices); });